3.7 cm Flak M42
| 3.7 cm/69 Flak M42 | |
|---|---|
A single 3.7 cm Flak M42U gun on the LM 42U mount. | |
| Type | Anti-aircraft gun |
| Place of origin | Nazi Germany |
| Service history | |
| In service | 1943–1945 |
| Used by | Kriegsmarine |
| Wars | World War II |
| Production history | |
| Designed | 1942 |
| Manufacturer | Rheinmetal-Borsig |
| Produced | 1943–1945 |
| Specifications (3.7 cm Flak M42) | |
| Mass | 109 kg (240 lb) |
| Barrel length | 2.56 cm (1.01 in) bore (69 calibers) |
| Crew | 3–4 |
| Shell | 37 × 249R |
| Shell weight | 635–700 g (1.400–1.543 lb) |
| Caliber | 37 mm (1.5 in) |
| Action | Recoil-operated |
| Breech | sliding breech block |
| Elevation | -10° to +90° |
| Traverse | 360° |
| Rate of fire | 250 rounds per minute (cyclic) |
| Muzzle velocity | 815–865 m/s (2,670–2,840 ft/s) |
| Effective firing range |
|
| Feed system | 5-round clips |
The 3.7 cm Flak M42 was the marine version of the 3.7-centimetre (1.5 in) Flak 36/37 and used by the Kriegsmarine on surface ships and as the M42U on Type VII and Type IX U-boats. The 3.7 cm Flak M42U used several types of mounts and entered service in autumn 1943.